CN203248735U - Solid insulation ring network cabinet large stroke direct motion sealing device - Google Patents

Abstract

The utility model discloses a large stroke direct motion sealing device for a solid insulation ring network cabinet. It includes a mounting seat, a direct-acting shaft is set in the mounting seat, limit guide sleeves are respectively provided at the front and rear ends of the inner hole of the mounting seat, a sealing ring and a retaining ring are arranged in the inner hole of the mounting seat, and the sealing ring is located outside the direct-acting shaft. between the inner diameter of the mounting seat and the inner diameter of the inner hole of the mounting seat, the sealing ring at the front end is pressed against the limit guide sleeve at the front end, the seal ring and the retaining ring are arranged at intervals, and there is a pressure between the rear end retaining ring and the limit guide sleeve at the rear end compressed spring. After adopting the above-mentioned structure, when the sealing ring wears out, the compression spring axially squeezes the sealing ring, so that the inner diameter and outer diameter of the sealing ring expand to compensate for the wear. At the same time, the set concave part increases the sealing Points make the sealing better, and the recessed part forms a lubricating oil storage chamber, which improves the lubricating performance, thus greatly reducing the possibility of sealing ring wear and achieving good sealing requirements.

Description

Solid insulation ring network cabinet large stroke direct motion sealing device

technical field

The utility model relates to a sealing device used in a solid insulating ring network cabinet, specifically a large-stroke direct-moving sealing device for a solid insulating ring network cabinet.

Background technique

Dynamic sealing devices are often used in the shaft-hole fit of solid insulated ring network cabinets. In the existing shaft-hole fit process, a sealing ring that can slide relatively is set between the shaft and the hole. The existing sealing method is adopted. Between the shaft and the sealing ring and between the hole and the sealing ring, wear often occurs during the sliding process, and the sealing effect after wear will be greatly reduced, so that the sealing requirements can no longer be met.

Contents of the invention

The technical problem to be solved by the utility model is to provide a large-stroke direct-acting sealing device for a solid-insulated ring main unit that can reduce the possibility of wear of the sealing ring and meet the requirements for good sealing.

In order to solve the above-mentioned technical problems, the large-stroke direct motion sealing device of the solid insulation ring main unit of the present invention includes a mounting seat, and there is a direct motion shaft coaxially arranged with the mounting seat in the mounting seat. There is a limit guide sleeve that is movably matched with the shaft diameter of the direct-acting shaft, and at least one set of sealing rings and retaining rings are arranged in the inner hole of the mounting seat from front to back. The sealing ring is located between the outer diameter of the direct-acting shaft and the mounting seat. Between the inner diameters of the inner holes, the frontmost sealing ring is pressed against the front limit guide sleeve, the sealing ring and the retaining ring are arranged at intervals so that the retaining ring is pressed against the end face of the sealing ring, and the rearmost retaining ring is in contact with the rear end. Compression springs are pressed between the limit guide sleeves.

The inner sealing surface formed by the sealing ring and the outer diameter of the linear shaft and the middle part of the outer sealing surface formed by the sealing ring and the inner diameter of the inner hole of the mounting seat are set as a concave concave part, and the concave part forms a lubricating oil reservoir. oil cavity.

The end faces of the left and right sides of the sealing ring are provided with annular concave recesses, so that the sealing ring forms two sections of sealing surfaces on the left and right end faces.

After the above-mentioned structure is adopted, since the sealing ring and the retaining ring are arranged in the inner hole of the mounting seat, a compression spring is pressed between the retaining ring at the rear end and the limit guide sleeve at the rear end. Squeeze the sealing ring to expand the inner diameter and outer diameter of the sealing ring to compensate for wear. At the same time, the middle part of the inner sealing surface and the outer sealing surface of the sealing ring is set as a concave part, which increases the sealing point and makes it The sealing is better, and the recessed part forms a lubricating oil storage chamber, which improves the lubricating performance, thus greatly reducing the possibility of sealing ring wear and meeting good sealing requirements.

Description of drawings

Fig. 1 is a structural schematic diagram of a large-stroke direct-moving sealing device for a solid insulation ring network cabinet of the present invention;

FIG. 2 is a schematic diagram of the enlarged structure at A in FIG. 1 .

Detailed ways

The large-stroke direct motion sealing device of the solid insulation ring main unit of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, the large-stroke direct motion sealing device of the solid insulation ring network cabinet of the present utility model includes a mounting base 1, and a direct motion shaft 2 coaxially arranged with the mounting base is arranged in the mounting base 1, and the inner hole of the mounting base 1 is The front and rear ends of the front and rear are respectively provided with a limit guide sleeve 3 which is movably matched with the shaft diameter of the direct motion shaft. At least one set of sealing ring 4 and retaining ring 5 are arranged in the inner hole of the mounting seat 1 from front to back, and the sealing ring 4 is located on the straight Between the outer diameter of the moving shaft and the inner diameter of the inner hole of the mounting seat, the sealing ring 4 at the front end is pressed against the limit guide sleeve at the front end, and the sealing ring 4 and the retaining ring 5 are arranged at intervals so that the retaining ring is pressed against the sealing ring On the end face of 4, a compression spring 6 is pressed between the retaining ring 5 at the rear end and the limit guide sleeve at the rear end.

Further, it is also possible to set a concave recessed part in the middle part of the inner sealing surface formed by the sealing ring 4 and the outer diameter of the linear shaft and the outer sealing surface formed by the sealing ring 4 and the inner diameter of the inner hole of the mounting seat. An oil storage chamber 7 for lubricating oil is formed, which has a good lubricating function.

In addition, the end faces of the left and right sides of the seal ring 4 can be provided with annular concave recesses, so that the seal ring can form two sections of sealing surfaces on the left and right end faces, thereby improving the sealing effect.

Furthermore, it is also possible to set ring-shaped concave concave parts on the end faces of the left and right sides of the sealing ring 4 while the middle part of the inner sealing surface and the outer sealing surface of the sealing ring is set as a concave concave part, thus constituting Plum-shaped sealing ring, the compression of the plum-shaped sealing ring has an automatic compensation function, which further enhances the sealing effect.

Claims (3)

1. A large-stroke direct-acting sealing device for a solid-insulated ring network cabinet, including a mounting base (1), and a direct-acting shaft (2) coaxially arranged with the mounting base in the mounting base (1), characterized in that: The front and rear ends of the inner hole of the mounting seat (1) are respectively provided with a limit guide sleeve (3) that is movably matched with the shaft diameter of the direct motion shaft, and at least There is a set of seal rings (4) and retaining rings (5), the seal rings (4) are located between the outer diameter of the direct motion shaft and the inner diameter of the inner hole of the mounting seat, and the frontmost seal ring (4) is pressed against On the limit guide sleeve at the front end, the sealing ring (4) and the retaining ring (5) are arranged at intervals so that the retaining ring is pressed against the end face of the sealing ring (4), and the rearmost retaining ring (5) and the rear end Compression springs (6) are pressed between the limit guide sleeves. 2. According to claim 1, the large-stroke direct motion sealing device of solid insulation ring network cabinet is characterized in that: the inner sealing surface formed by the sealing ring (4) and the outer diameter of the direct motion shaft and the sealing ring (4) and The middle part of the outer sealing surface formed by the inner diameter of the inner hole of the mounting seat is set as a concave concave part, and the concave part forms an oil storage chamber (7) for lubricating oil. 3. According to claim 1, the large-stroke direct-moving sealing device of the solid insulation ring network cabinet is characterized in that: the end faces of the left and right sides of the sealing ring (4) are provided with annular concave recesses and make The sealing ring forms two sections of sealing surfaces on the left and right end faces.

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